Problem: Combination Sum

Medium

30 min

Explore how to solve the Combination Sum problem by identifying unique sets of numbers that sum to a target. This lesson teaches dynamic programming approaches to efficiently generate all valid combinations where elements can be reused. Understand problem constraints and practice implementing solutions to build strong optimization skills.

Statement

Given an array of distinct integers, nums, and an integer, target, return a list of all unique combinations of nums where the chosen numbers sum up to the target. The combinations may be returned in any order.

An integer from nums may be chosen an unlimited number of times. Two combinations are unique if the frequency of at least one of the chosen integers is different.

Constraints:

$1 \leq$ nums.length $\leq 30$
$2 \leq$ nums[i] $\leq 40$
$1 \leq$ target $\leq 40$
All integers of nums are unique.

Problem: Combination Sum

Medium

30 min

Statement

An integer from nums may be chosen an unlimited number of times. Two combinations are unique if the frequency of at least one of the chosen integers is different.

Constraints:

$1 \leq$ nums.length $\leq 30$
$2 \leq$ nums[i] $\leq 40$
$1 \leq$ target $\leq 40$
All integers of nums are unique.

Problem: Combination Sum

Statement

Examples

Understand the problem

Figure it out!

Try it yourself

Problem: Combination Sum

Statement

Examples

Understand the problem

Figure it out!

Try it yourself